I have Safari, Firefox, Camino, Chrome, Netscape, Opera, iCab, OmniWeb and SeaMonkey all working with the latest update to the Flash Player. IE 5.2.3 for Mac was discontinued five years ago and under no circumstances (other than to see how badly things look with it) should you be using it. I have Firebird as well (the predecessor to Firefox) and it works about like IE, but I keep it for nostalgic reasons. I never use it for anything but testing though because it just doesn't function with the latest plug-ins and add-ons. Try trashing the preferences for each of the other browsers (Users\Library|Preferences) and restarting them.
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